Apache is a free and open-source cross-platform web server software.
DoubleClick for Publishers (DFP) is a hosted ad serving platform that streamlines your ad management.
Google AdSense is a program run by Google through which website publishers serve advertisements that are targeted to the site content and audience.
Google Maps is a web mapping service. It offers satellite imagery, aerial photography, street maps, 360° interactive panoramic views of streets, real-time traffic conditions, and route planning for traveling by foot, car, bicycle and air, or public transportation.
Google Publisher Tag (GPT) is an ad tagging library for Google Ad Manager which is used to dynamically build ad requests.
Open Graph is a protocol that is used to integrate any web page into the social graph.
Twitter is a 'microblogging' system that allows you to send and receive short posts called tweets.